From cd5ac041f24a9c3a13ea80283c093bf2793f9eae Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Wed, 30 Oct 2024 12:07:55 +0100
Subject: [PATCH] hierarchy: improve error message

* spot/tl/hierarchy.cc (mp_class): Fix type of o so that it is
displayed as an character in error messages.
---
 spot/tl/hierarchy.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spot/tl/hierarchy.cc b/spot/tl/hierarchy.cc
index 3ab6f5930..5112c9c12 100644
--- a/spot/tl/hierarchy.cc
+++ b/spot/tl/hierarchy.cc
@@ -312,7 +312,7 @@ namespace spot
     bool wide = false;
     if (opt)
       for (;;)
-        switch (int o = *opt++)
+        switch (char o = *opt++)
           {
           case 'v':
             verbose = true;